Generally, good businessmen are good poker players. It's no surprise that so many business leaders in Silicon Valley are obsessed with poker.

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Chamath Palihapitiya (Social+Capital founder)

Social Capital founder Chamath Palihapitiya
YouTube

Chamath Palihapitiya is known as one of the most hardcore poker players in the Valley. He's played in several World Series of Poker events, and finished 101st out of more than 7,000 contestants in 2011.

David Sacks (Yammer founder)

Yammer founder David Sacks
Owen Thomas, Business Insider

David Sacks has also played in the World Series of Poker, and alongside Palihapitiya, is frequently mentioned as the top poker player in Silicon Valley. In a past interview, Sacks said he doesn't believe in hobbies, but likes to play poker.

He often plays with professional poker player Phil Hellmuth, too. "I'm not in the same league as [Phil Hellmuth], but I'm not a donkey," he said in a past interview.

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Jason Calacanis (Inside.com founder)

Inside.com and Mahalo founder Jason Calacanis

Jason Calacanis isn't afraid to talk about his pokerbobsession, and said in a previous interview that he was "absolutely addicted" to it at one point. He's a serious poker player and was sponsored by FullTiltPoker when he played in the World Series of Poker for the first time in 2009.

He's so into the game that he even thinks of his company like it's part of the game. "Risk-taking is my thing … I think of my company as my chip stack," he told PokerListings.

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Dave Goldberg (SurveyMonkey CEO)

SurveyMonkey CEO Dave Goldberg
Business Insider Video

Another frequently mentioned name among the Valley tech leaders is SurveyMonkey's Dave Goldberg.

He's played in a number of big-time poker tournaments and is known for being a highly skilled poker player. He once told Bloomberg, "Some of us are not the world's greatest athletes. But you can become a pretty good poker player."

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Phil Hellmuth (professional poker player)

Professional poker player Phil Hellmuth
Julia La Roche for Business Insider

Phil Hellmuth is one of the best professional poker players in the world, so he probably doesn't belong on a list of amateur players. But he lives in Palo Alto and is good friends with a lot of Silicon Valley entrepreneurs. He even gets invited to many private poker games with them.

He told Business Insider that their level of play is so high he was only able to break-even in the first three years playing with them. "There's a reason these guys made so much money in the real world. Those skills translate to poker," he said.

Mark Pincus (Zynga cofounder)

Pincus is perhaps better known for creating one of the best online poker games (Zynga Poker), but he often uses poker metaphors in interviews, showing his affection for the game.

In one interview, he said, "Treat your company like a hand of poker. You don't play every hand, and by folding a lot of hands, you don't waste your chips or your time on mediocre or bad hands. But when you do find a good hand, then go all-in."

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Roger Sippl (Informix founder)

Informix founder Roger Sippl
YouTube

With over 30 years of experience in technology, Roger Sippl is a living legend in Silicon Valley.

He's also played in some of the biggest poker games in the world, traveling as far as Macau to play in professional tournaments.

He's been playing poker for a long time, he says. "I've been playing since I was in my high chair. My grandmother taught me how to play and would deal to me and used to hand out pennies to everyone, but would win them back before dinner," he told Pokernews.com.